/**
 * Copyright (C) 2016 Newland Group Holding Limited
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.newlandframework.rpc.netty;

import io.netty.channel.ChannelHandlerContext;

import java.util.Map;
import java.util.concurrent.Callable;

import com.newlandframework.rpc.model.MessageRequest;
import com.newlandframework.rpc.model.MessageResponse;
import org.apache.commons.lang3.reflect.MethodUtils;

/**
 * @author tangjie<https://github.com/tang-jie>
 * @filename:MessageRecvInitializeTask.java
 * @description:MessageRecvInitializeTask功能模块
 * @blogs http://www.cnblogs.com/jietang/
 * @since 2016/10/7
 */
public class MessageRecvInitializeTask implements Callable<Boolean> {

    private MessageRequest request = null;
    private MessageResponse response = null;
    private Map<String, Object> handlerMap = null;
    private ChannelHandlerContext ctx = null;

    public MessageResponse getResponse() {
        return response;
    }

    public MessageRequest getRequest() {
        return request;
    }

    public void setRequest(MessageRequest request) {
        this.request = request;
    }

    MessageRecvInitializeTask(MessageRequest request, MessageResponse response, Map<String, Object> handlerMap) {
        this.request = request;
        this.response = response;
        this.handlerMap = handlerMap;
        this.ctx = ctx;
    }

    public Boolean call() {
        response.setMessageId(request.getMessageId());
        try {
            Object result = reflect(request);
            response.setResult(result);
            return Boolean.TRUE;
        } catch (Throwable t) {
            response.setError(t.toString());
            t.printStackTrace();
            System.err.printf("RPC Server invoke error!\n");
            return Boolean.FALSE;
        }
    }

    private Object reflect(MessageRequest request) throws Throwable {
        String className = request.getClassName();
        Object serviceBean = handlerMap.get(className);
        String methodName = request.getMethodName();
        Object[] parameters = request.getParameters();
        return MethodUtils.invokeMethod(serviceBean, methodName, parameters);
    }
}
